mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 01:38:22 +00:00
188 lines
3.8 KiB
C
188 lines
3.8 KiB
C
/*
|
|
* (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de>
|
|
*
|
|
* (C) Copyright 2000-2004
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <asm/processor.h>
|
|
|
|
#ifdef CONFIG_M5272
|
|
#include <asm/m5272.h>
|
|
#include <asm/immap_5272.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5282
|
|
#include <asm/m5282.h>
|
|
#include <asm/immap_5282.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5249
|
|
#include <asm/m5249.h>
|
|
#endif
|
|
|
|
|
|
#define NR_IRQS 31
|
|
|
|
/*
|
|
* Interrupt vector functions.
|
|
*/
|
|
struct interrupt_action {
|
|
interrupt_handler_t *handler;
|
|
void *arg;
|
|
};
|
|
|
|
static struct interrupt_action irq_vecs[NR_IRQS];
|
|
|
|
static __inline__ unsigned short get_sr (void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
asm volatile ("move.w %%sr,%0":"=r" (sr):);
|
|
|
|
return sr;
|
|
}
|
|
|
|
static __inline__ void set_sr (unsigned short sr)
|
|
{
|
|
asm volatile ("move.w %0,%%sr"::"r" (sr));
|
|
}
|
|
|
|
/************************************************************************/
|
|
/*
|
|
* Install and free an interrupt handler
|
|
*/
|
|
void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
|
|
{
|
|
#ifdef CONFIG_M5272
|
|
volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
|
|
#endif
|
|
int vec_base = 0;
|
|
|
|
#ifdef CONFIG_M5272
|
|
vec_base = intp->int_pivr & 0xe0;
|
|
#endif
|
|
|
|
if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) {
|
|
printf ("irq_install_handler: wrong interrupt vector %d\n",
|
|
vec);
|
|
return;
|
|
}
|
|
|
|
irq_vecs[vec - vec_base].handler = handler;
|
|
irq_vecs[vec - vec_base].arg = arg;
|
|
}
|
|
|
|
void irq_free_handler (int vec)
|
|
{
|
|
#ifdef CONFIG_M5272
|
|
volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
|
|
#endif
|
|
int vec_base = 0;
|
|
|
|
#ifdef CONFIG_M5272
|
|
vec_base = intp->int_pivr & 0xe0;
|
|
#endif
|
|
|
|
if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) {
|
|
return;
|
|
}
|
|
|
|
irq_vecs[vec - vec_base].handler = NULL;
|
|
irq_vecs[vec - vec_base].arg = NULL;
|
|
}
|
|
|
|
void enable_interrupts (void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
sr = get_sr ();
|
|
set_sr (sr & ~0x0700);
|
|
}
|
|
|
|
int disable_interrupts (void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
sr = get_sr ();
|
|
set_sr (sr | 0x0700);
|
|
|
|
return ((sr & 0x0700) == 0); /* return TRUE, if interrupts were enabled before */
|
|
}
|
|
|
|
void int_handler (struct pt_regs *fp)
|
|
{
|
|
#ifdef CONFIG_M5272
|
|
volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
|
|
#endif
|
|
int vec, vec_base = 0;
|
|
|
|
vec = (fp->vector >> 2) & 0xff;
|
|
#ifdef CONFIG_M5272
|
|
vec_base = intp->int_pivr & 0xe0;
|
|
#endif
|
|
|
|
if (irq_vecs[vec - vec_base].handler != NULL) {
|
|
irq_vecs[vec -
|
|
vec_base].handler (irq_vecs[vec - vec_base].arg);
|
|
} else {
|
|
printf ("\nBogus External Interrupt Vector %d\n", vec);
|
|
}
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_M5272
|
|
int interrupt_init (void)
|
|
{
|
|
volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
|
|
|
|
/* disable all external interrupts */
|
|
intp->int_icr1 = 0x88888888;
|
|
intp->int_icr2 = 0x88888888;
|
|
intp->int_icr3 = 0x88888888;
|
|
intp->int_icr4 = 0x88888888;
|
|
intp->int_pitr = 0x00000000;
|
|
/* initialize vector register */
|
|
intp->int_pivr = 0x40;
|
|
|
|
enable_interrupts ();
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5282
|
|
int interrupt_init (void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5249
|
|
int interrupt_init (void)
|
|
{
|
|
enable_interrupts ();
|
|
|
|
return 0;
|
|
}
|
|
#endif
|